Staff Data Systems Engineer

Lightmatter•Mountain View, CA

15h•Hybrid

About The Position

Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads. Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter! If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders. Lightmatter is (re)inventing the future of computing with light! About this Role We're looking for a Senior Data Systems Engineer who bridges the gap between hardware domain expertise and modern data infrastructure. You won't just build pipelines — you'll work directly with foundries, OSATs, test engineers, and validation teams to understand what the data means, define how it should flow, and build the platform that makes AI-driven decisions possible across 13+ active hardware programs. This is not a typical data engineering role. The right person has a background in semiconductor manufacturing, photonics, hardware test/validation, or a related hardware discipline — and a strong pull toward data systems, process optimization, and automation. You understand that the hardest part of a data platform isn't the code; it's knowing which data matters and why.

Requirements

Bachelor’s Degree in Photonics, Data Engineering, Electrical Engineering or a related field
8+ years of professional experience in data engineering, process engineering, test engineering, or a related technical role in semiconductor, photonics, or hardware manufacturing
Proficiency in Python and SQL
Experience with Snowflake, dbt, Dagster/Airflow, or similar modern data stack components
Experience working with data for hardware test, manufacturing, or characterization systems
Demonstrated ability to work cross-functionally with technical teams and external partners (vendors, foundries, or OSATs) to define data requirements and influence practices
Strong analytical thinking — you can look at a dataset and understand what it means in the physical world, not just how to transform it

Nice To Haves

Master’s or PhD in Physics, Electrical Engineering, Photonics, or a related field with 4+ years of experience
Background in silicon photonics, photonic integrated circuits (PICs), or optical systems
Experience with High Volume Manufacturing (HVM) ramps or new product introduction (NPI) data workflows
Familiarity with semiconductor test data formats (STDF, WAT, parametric data)
Experience building data quality frameworks or monitoring systems
Experience with AI/ML tools applied to manufacturing or engineering data

Responsibilities

Engage directly with foundries, OSATs, and internal engineering teams to align on data formats, delivery mechanisms, and quality standards for new programs
Own the data onboarding lifecycle for programs ramping to High Volume Manufacturing (HVM)
Identify gaps in data coverage across the pipeline: design, foundry, test/validation, photonics characterization, packaging/assembly, and system-level validation
Influence external and internal teams to adopt scalable, platform-compatible data practices — this is hands-on stakeholder work, not email coordination
Design, build, and maintain data pipelines that ingest, transform, and deliver hardware data from wafer-level test through system validation
Build and maintain data models in dbt on Snowflake that serve downstream analytics, reporting, and AI/ML workflows
Develop and operate orchestration workflows (Dagster) for reliable, observable data delivery
Implement data quality checks, monitoring, and alerting to ensure platform reliability across production programs
Build performance metrics pipelines that translate raw hardware data into actionable insights for engineering and program teams
Own stakeholder reporting and deliver training for teams onboarding to platform tools (Snowflake, Sigma, custom dashboards)
Support AI/ML workflows by ensuring the data foundation is clean, structured, and reliable
Contribute to platform infrastructure: CI/CD, RBAC, cost optimization, self-service tooling
Participate in sprint ceremonies, contribute to architectural decisions, and help shape the team's technical roadmap
Mentor junior team members on both data engineering practices and hardware domain context